Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (870,053 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Marwa Elkady
Chemical Engineering
Fabrication Technology
Materials Science
Environmental Science
Metrics
H-Index
i10 Index
Citation
45
143
6,714
* Rankings
Ranking Based On Selection: 2
AH El Shazly
Separation Processes
Waste treatment
Nanomaterials
Corrosion
Desalination
Metrics
H-Index
i10 Index
Citation
31
85
3,218
* Rankings
Ranking Based On Selection: 4
Hussien Noby
Nanotechnology
Materials Composites
Membrane Technologies
Wastewater
Chemical Engineering.
Metrics
H-Index
i10 Index
Citation
10
10
256
Ahmed Hammad|Ahmed Hammad
photo-catalysis
Hydrogen Production
Water treatment & desalination
Bio-fuel
PEM Fuel cell.
Metrics
H-Index
i10 Index
Citation
9
9
451
Nasser Alhassan
Catalysis
Graphene
Fischer-Tropsch Synthesis
Petrochemicals
Bio/Fossil Fuel Blends.
Metrics
H-Index
i10 Index
Citation
7
5
251
Sarah Zayan
Chemical engineering
metal-organic framework
membrane
wastewater treatment
conductive polymers
Metrics
H-Index
i10 Index
Citation
2
1
23
Rankings
Ranking Based On Selection: 1
Marwa Elkady
Metrics
H-Index
i10 Index
Citation Counts
45
143
6,714
Chemical Engineering
Fabrication Technology
Materials Science
Environmental Science
Rankings
Ranking Based On Selection: 2
AH El Shazly
Metrics
H-Index
i10 Index
Citation Counts
31
85
3,218
Separation Processes
Waste treatment
Nanomaterials
Corrosion
Desalination
Rankings
Ranking Based On Selection: 3
Mona Gamal Eldin Ibrahim
Metrics
H-Index
i10 Index
Citation Counts
30
67
2,633
Environmental Management
Chemical Engineering
Energy Conservation
Rankings
Ranking Based On Selection: 4
Hussien Noby
Metrics
H-Index
i10 Index
Citation Counts
10
10
256
Nanotechnology
Materials Composites
Membrane Technologies
Wastewater
Chemical Engineering.
Rankings
Ranking Based On Selection: 5
Ahmed Hammad|Ahmed Hammad
Metrics
H-Index
i10 Index
Citation Counts
9
9
451
photo-catalysis
Hydrogen Production
Water treatment & desalination
Bio-fuel
PEM Fuel cell.
Rankings
Ranking Based On Selection: 6
Nasser Alhassan
Metrics
H-Index
i10 Index
Citation Counts
7
5
251
Catalysis
Graphene
Fischer-Tropsch Synthesis
Petrochemicals
Bio/Fossil Fuel Blends.
Rankings
Ranking Based On Selection: 7
Sarah Zayan
Metrics
H-Index
i10 Index
Citation Counts
2
1
23
Chemical engineering
metal-organic framework
membrane
wastewater treatment
conductive polymers
Rankings
Ranking Based On Selection: 8
Noha M.Sayed
Metrics
H-Index
i10 Index
Citation Counts
2
0
9